ABSTRACT
OBJECTIVE:To optimize the formulation technology of Ibuprofen sustained-release dropping pill and evaluate its in vitro drug-release characteristics. METHODS:Using stearic acid as sustained-release matrix,polyethylene glycol 6000 as imme-diate-release matrix,melting method was used to prepare the Ibuprofen sustained-release dropping pill. Using the comprehensive scores of roundness,weight difference,drug loading rate,in vitro drug-release time as indexes,drug-matrix mass ratio,liquid tem-perature,condensation temperature,dropping distance as factors,orthogonal test was adopted to optimize the formulation technolo-gy,and verification test was conducted. In media of deionized water,hydrochloric acid solution (pH 1.2),phosphate buffer (pH 4.5,6.8),the in vitro drug-release were compared between self-made sustained-release dropping pill and commercially available Ibuprofen sustained-release capsule,which were fitted for former drug-release behavior. RESULTS:The optimal formulation tech-nology was as follows as mass ratio of ibuprofen-polyethylene glycol 6000-stearic acid of 4.0:15.3:0.7,liquid temperature of 83 ℃,condensation temperature of 8 ℃,and dropping distance of 11 cm. The weight difference of prepared 3 batches of Ibupro-fen sustained-release dropping pill was 2.067%(RSD=1.19%),roundness was 96.73%(RSD=0.28%),drug loading rate was 96.31%(RSD=0.19%),cumulative release rate in 12 h was 93.05%(RSD=0.81%). The f2 values of self-made sustained-re-lease dropping pill and commercially available Ibuprofen sustained-release capsule were greater than 50,the former one fitted more into Higucci equation(r=0.9881-0.9972). CONCLUSIONS:The formulation technology of Ibuprofen sustained-release dropping pill is successfully optimized,and in vitro drug-release behavior of prepared sustained-release dropping pill is similar to commercial-ly available Ibuprofen sustained-release capsule.
ABSTRACT
OBJECTIVE:To optimize the formulation technology of Ibuprofen sustained-release dropping pill and evaluate its in vitro drug-release characteristics. METHODS:Using stearic acid as sustained-release matrix,polyethylene glycol 6000 as imme-diate-release matrix,melting method was used to prepare the Ibuprofen sustained-release dropping pill. Using the comprehensive scores of roundness,weight difference,drug loading rate,in vitro drug-release time as indexes,drug-matrix mass ratio,liquid tem-perature,condensation temperature,dropping distance as factors,orthogonal test was adopted to optimize the formulation technolo-gy,and verification test was conducted. In media of deionized water,hydrochloric acid solution (pH 1.2),phosphate buffer (pH 4.5,6.8),the in vitro drug-release were compared between self-made sustained-release dropping pill and commercially available Ibuprofen sustained-release capsule,which were fitted for former drug-release behavior. RESULTS:The optimal formulation tech-nology was as follows as mass ratio of ibuprofen-polyethylene glycol 6000-stearic acid of 4.0:15.3:0.7,liquid temperature of 83 ℃,condensation temperature of 8 ℃,and dropping distance of 11 cm. The weight difference of prepared 3 batches of Ibupro-fen sustained-release dropping pill was 2.067%(RSD=1.19%),roundness was 96.73%(RSD=0.28%),drug loading rate was 96.31%(RSD=0.19%),cumulative release rate in 12 h was 93.05%(RSD=0.81%). The f2 values of self-made sustained-re-lease dropping pill and commercially available Ibuprofen sustained-release capsule were greater than 50,the former one fitted more into Higucci equation(r=0.9881-0.9972). CONCLUSIONS:The formulation technology of Ibuprofen sustained-release dropping pill is successfully optimized,and in vitro drug-release behavior of prepared sustained-release dropping pill is similar to commercial-ly available Ibuprofen sustained-release capsule.
ABSTRACT
ABSTACT OBJECTIVE:To study the formation technology of Ibuprofen dropping pills and determine the dissolution in vitro. METHODS:Based on single factor test and with the spherical degree,drug-loading rate and pill weight variation as the evaluated indexes,response surface methodology was employed to screen the ratios of drug to matrix,drug solution temperatures and cryo-genic temperatures in the formation technology,and verification tests were conducted. The dissolution in vitro of the dropping pills prepared by the optimal technology was investigated and compared with that of the preparations sold in the market. RESULTS:The optimal formation technology of Ibuprofen dropping pills was as follows as the ratio of drug to matrix of 1∶6,drug solution temper-ature of 83 ℃ and cryogenic temperature of 7.3 ℃. In the verification tests,the self-made dropping pills demonstrated a spherical degree of 0.945 9,drug-loading rate of 99.82%,pill weight variation of 0.040 28 and drug-loading capacity of 30 mg/pill,with the actual comprehensive score of 0.972 5,deviating from the theoretical one (0.980 0) by 0.771 2%(RSD<1.5%,n=3). The dropping pills prepared had a dissolution rate of 25.36%at 5 min and an accumulated dissolution rate up to 90.12%at 30 min,sim-ilar with the Ibuprofen tablets sold in the market in drug release in vitro (f2=54.91),conforming to a first-order kinetic equation. CONCLUSIONS:The optimized formation technology is simple,stable,feasible and well reproducible,and the dropping pills which are prepared by such technology can release drug quickly.